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loop initialization protocol (LIP). A method by which
a device in a Fibre Channel Arbitrated Loop acquires its
AL_PA.
loss. In fiber optics technology, the amount of a
signal’s power (expressed in dB) that is lost in
connectors, splices, or fiber defects.
Low Voltage Differential (LVD). A low-noise,
low-power, and low-amplitude electrical signaling system
that enables data communication between a supported
server and the Ultrium Tape Drive. LVD signaling uses
two wires to drive one signal over copper wire. The use
of wire pairs reduces electrical noise and crosstalk.
LTO. See Linear Tape-Open.
LTO cartridge memory (LTO-CM). Within each LTO
Ultrium Data Cartridge, an embedded electronics and
interface module that can store and retrieve a
cartridge’s historical usage and other information.
LTO-CM. See LTO cartridge memory.
LVD. See Low Voltage Differential.
M
m. See meter.
magnetic tape. A tape with a magnetizable surface
layer on which data can be stored by magnetic
recording.
maintenance mode. The state of operation in which
the Ultrium Tape Drive must be before it can run
diagnostics, verify write and read operations, verify a
suspect tape cartridge, update its own firmware, and
perform other diagnostic and maintenance functions.
MB. See megabyte.
media. The plural of medium.
media capacity. See capacity.
medium. A physical material in or on which data may
be represented, such as magnetic tape.
megabyte (MB). 1 000 000 bytes.
metal particle tape. In the LTO Ultrium Tape
Cartridge, tape that uses very small, pure metal
particles (rather than oxide coatings) in the magnetic
layer.
meter. In the Metric System, the basic unit of length;
equal to approximately 39.37 inches.
micrometer. One millionth of a meter (.000001 m).
Synonymous with micron. Abbreviated as µm.
micron. One millionth of a meter (.000001 m).
Synonymous with micrometer. Abbreviated as µm.
millimeter. One thousandth of a meter (.001 m).
mm. See millimeter.
Model T200. The version of the Ultrium Internal Tape
Drive that uses the SCSI interface.
Model T200F. The version of the Ultrium Internal Tape
Drive that uses the Fibre Channel interface.
multimode fiber. An optical fiber that has a core that
is large enough to propagate more than one
electromagnetic wave of light. The typical diameter is
62.5 micrometers.
N
N/A. Not applicable.
native storage capacity. The amount of data that can
be stored without compression on a tape cartridge.
native sustained data transfer rate. See data
transfer rate.
network. A configuration of data processing devices
and software that is connected for information
interchange.
network server. In a local area network, a personal
computer that provides access to files for all of the
workstations in the network.
node. In Fibre Channel technology, a communicating
device.
ntutil. Created by IBM, a utility program for LTO
devices that connect to Windows NT and Windows
2000. ntutil provides problem determination for
hardware or connections, assists with device and
medium changer recognition, forces dumps, loads new
firmware, sends and receives SCSI commands to and
from the hardware, and obtains SCSI sense data to use
in resolving errors.
O
oersted. The unit of magnetic field strength in the
unrationalized centimeter-gram-second (cgs)
electromagnetic system. The oersted is the magnetic
field strength in the interior of an elongated, uniformly
wound solenoid that is excited with a linear current
density in its winding of one abamper per 4π
centimeters of axial length.
offline. The operating condition that the Ultrium Tape
Drive is in when the server’s applications cannot interact
with it.
online. The operating condition that the Ultrium Tape
Drive is in when the server’s applications can interact
with it.
Glossary 97
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